Hi Bob, hope you don’t mind me adding some thoughts. (I watched the analysis video, but wasn’t part of the analysis or anything.)
The fact that every other story point in that Othello analysis has so much detail, but the MC Solution only has that one sentence
If Othello had used his conscience he could have prevented the tragedy.
… makes me suspicious that the illustration of that one point is a bit lacking. I don’t remember Othello very well but I wonder if it’s like, he’s a character who starts with all this tension between his being moral / noble (MC Issue: Morality) and having a tendency to being easily tempted (MC Problem: Temptation). And those two things battle it out to the point where he can completely ignore his Conscience? So he embraces his Solution (ignoring one’s conscience), but not in a way that could overcome personal problems or solve the overall problems.
Personally I think those argument statements only make sense if you consider the Grand part of the Grand Argument Story – a complete story is only trying to argue something like that within the big context it sets up. I don’t think Star Wars argues that trusting something outside yourself is always the way to go, but that in a certain context it is. i.e. if you find yourself in a similar situation to Luke, give trust a try!
So maybe from that perspective, the Ex Machina argument statement makes more sense?